Charlie Foster runs an SIS network into East Berlin.

When Three of his couriers are arrested and London is ready to let them rot, Charlie, in anger, does his own deal. He trades his services to the East Germans and the Russians in exchange for his people's freedom.

From his collaboration he builds up a complete picture of all those in Europe who were Stasi and KGB informers. When the Berlin Wall comes down Charlie Foster has something everybody wants. SIS, the West Germans, the Americans and all the collaborators. They are all determined to get Charlie Foster's list. Or Charlie himself.